United States Patent Office Patented Mar
2,879,215 United States Patent Office Patented Mar. 24, 1959 1 temperatures it is necessary in general, by reason of the 2,879,215 position of the freezing point of the hydrocarbons, to add diluents which are inert to the reactants, as for exam PRODUCTION OF CYCLOALEPHATIC KETOXIMES ple carbon tetrachloride, chloroform or benzene. The AND THER HYDROCHLORDES addition of diluents may also be advantageous, however, Walter Reppe, Hans-Joachim Ried, and Otto von Schickh, at room temperature in order to facilitate the separation Ludwigshafen (Rhine), Germany, assignors to Badische and removal of the oxime hydrochlorides. - Anilin- & Soda-Fabrik Aktiengesellschaft, Ltdwigs The free oxime may be recovered in known manner hafen (Rhine), Germany from the separated oxime hydrochlorides. For this pur No Drawing. Application August 6, 1956 O pose the oxime hydrochloride is dissolved for example in a little water and neutralized with substances having Serial No. 602,445 an alkaline reaction, such as caustic soda or potash solu 8 Claims. (C. 204-158) tions, alkali carbonates or ammonia. The free oximes in general separate immediately in crystallized form when This invention relates to an improved process for the 5 working carefully. production of cycloaliphatic ketoximes and their hydro Suitable cycloaliphatic hydrocarbons for the process chlorides. are for example cyclopentane, cyclohexane, cycloheptane, It is known that from the reaction products of nitrosyl cyclooctane and their alkyl derivatives. chloride with cycloaliphatic hydrocarbons in light, the AS active light there may be used the emissions of corresponding ketoximes can be recovered. The yields, 20 mercury vapor or other metal vapor lamps, electric arcs, however, are very unsatisfactory; it is only by main fluorescent tubes, incandescent bulbs and also sunlight.
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